Can't hide Bottom Sheet, Android

Question

I'm having problems with my bottom-sheet because when I open the activity it is on, blocking the view

This happens, I think, because of the XML attribute declaring the bottom-sheet with 350dp of height:

<android.support.v4.widget.NestedScrollView
    android:id="@+id/bottom_sheet"
    android:layout_width="match_parent"
    android:layout_height="350dp"
    android:background="?android:attr/windowBackground"
    android:clipToPadding="true"
    app:layout_behavior="android.support.design.widget.BottomSheetBehavior">

The thing is, I can't change that value to 0dp because the next time when I try to open the bottom-sheet, there is no bottom-sheet, because the height is 0dp, so it won't show anything. My question is, is there a way to declare the bottom-sheet off? (I've tried to setState to STATE_COLLAPSED but didn't work). Bellow is the java code that interacts with the Bottom Sheet. JAVA:

View bottomSheet = findViewById( R.id.bottom_sheet );
        mBottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);
        mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
        mBottomSheetBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
            @Override
            public void onStateChanged(View bottomSheet, int newState) {
                if (newState == BottomSheetBehavior.STATE_COLLAPSED) {
                    //mBottomSheetBehavior.setPeekHeight(0);
                    //mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
                    //mBottomSheetBehavior.isHideable();
                }
            }

            @Override
            public void onSlide(View bottomSheet, float slideOffset) {

            }
        });

Answer 1

In my case i was not able to hide the bottomsheet and it was placed on top of my view. I found out that animateLayoutChanges = "true" in my layout file was causing this issue.

Answer 2

first you have to add the attribute

app:behavior_hideable="true"

in your

<android.support.v4.widget.NestedScrollView
    android:id="@+id/bottom_sheet"
    android:layout_width="match_parent"
    android:layout_height="350dp"
    android:background="?android:attr/windowBackground"
    android:clipToPadding="true"
    app:layout_behavior="android.support.design.widget.BottomSheetBehavior">

And then you can hide the bottom sheet using

mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN)

and not

mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED)

the state COLLAPSED is between HIDDEN and EXPANDED and his heigth must be specified by the attribute:

app:behavior_peekHeight="200dp"

Answer 3

Write this:

    mBottomSheetBehavior.setPeekHeight(0);